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Patent
D287621
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Priority
Apr 12 1984
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Filed
Apr 12 1984
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Issued
Jan 06 1987
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Expiry
Jan 06 2001
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Assg.orig
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Entity
unknown
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2
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18
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n/a
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The ornamental design for a clean air work station, as shown and described.
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FIG. 1 is a front elevational view of a clean air work station, showing my
new design;
FIG. 2 is a right side elevational view, the left side being a mirror image
thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a bottom plan view thereof.
Shields, William R.
Patent |
Priority |
Assignee |
Title |
1934808, |
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3273323, |
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3284148, |
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3340788, |
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3425335, |
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3726206, |
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3728866, |
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3811250, |
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3895570, |
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3897721, |
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4249463, |
May 23 1978 |
HOWORTH AIRTECH LIMITED, VICTORIA WORKS, |
Workstation |
4267769, |
Feb 22 1979 |
ENVIROCO CORP |
Prefabricated knockdown clean room |
4534281, |
Sep 26 1983 |
Labconco Corporation |
Laboratory fume hood |
201678, |
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206001, |
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221846, |
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221847, |
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224737, |
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Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
Apr 04 1984 | SHIELDS, WILLIAM R | ENVIRONMENTAL AIR CONTROL COMPANY, INC | ASSIGNMENT OF ASSIGNORS INTEREST | 004247 | /0733 |
pdf |
Apr 12 1984 | | Environmental Air Control, Inc. | (assignment on the face of the patent) | | / |
Dec 28 1992 | ENVIRONMENTAL AIR CONTROL, INC | Donaldson Company, Inc | ASSIGNMENT OF ASSIGNORS INTEREST | 006449 | /0362 |
pdf |
Feb 11 1993 | ENVIRCO CORP | ALLIED INVESTMENT CORPORATION II | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 006537 | /0722 |
pdf |
Feb 11 1993 | ENVIRCO CORP | ALLIED INVESTMENT CORPORATION | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 006537 | /0722 |
pdf |
Feb 11 1993 | Donaldson Company, Inc | ENVIRCO CORP | ASSIGNMENT OF ASSIGNORS INTEREST | 006449 | /0355 |
pdf |
Jun 22 1994 | Envirco Corporation | SUNWEST BANK OF ALBUQUERQUE N A | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 007148 | /0718 |
pdf |
Aug 09 1994 | ALLIED INVESTMENT CORPORATION II, A CORP OF MD | ENVIROCO CORP | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007304 | /0986 |
pdf |
Aug 09 1994 | ALLIED INVESTMENT CORPORATION, A CORP OF MD | ENVIROCO CORP | ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS | 007304 | /0986 |
pdf |
Jul 28 1995 | SUNWEST BANK OF ALBUQUERQUE, NA | Envirco Corporation | RELEASED | 007596 | /0153 |
pdf |
Jul 25 2000 | Envirco Corporation | Congress Financial Corporation | SECURITY INTEREST SEE DOCUMENT FOR DETAILS | 011213 | /0622 |
pdf |
Mar 20 2007 | WACHOVIA BANK, NA | Envirco Corporation | RELEASE BY SECURED PARTY SEE DOCUMENT FOR DETAILS | 019047 | /0619 |
pdf |
Date |
Maintenance Fee Events |
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Date |
Maintenance Schedule |
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